Fix circular import issue in Python 3.14.

[susilehtola]

Description

Fixes the circular import issue revealed in the QCengine build, MolSSI/QCEngine#505

I also had another issue in rc5,

diff -up QCElemental-0.50.0rc5/pyproject.toml.bak QCElemental-0.50.0rc5/pyproject.toml
--- QCElemental-0.50.0rc5/pyproject.toml.bak    2026-05-18 09:07:49.332674024 +0000
+++ QCElemental-0.50.0rc5/pyproject.toml        2026-05-18 09:07:55.360201914 +0000
@@ -110,8 +110,8 @@ init_typed = true
 warn_required_dynamic_aliases = true
 warn_untyped_fields = true
 
-[tool.setuptools]
-packages = ["qcelemental"]
+[tool.setuptools.packages.find]
+include = ["qcelemental*"]
 
 [tool.setuptools.package-data]

but this code appears to have changed in the master branch.

Changelog description

Fixed circular import issue in Python 3.14.

Status

• Code base linted
• Ready to go

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.84%. Comparing base (1391f04) to head (0cb8184).
⚠️ Report is 39 commits behind head on master.

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